Diffuser



FIG. 1 is a front and top perspective view of diffuser showing claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a front and top perspective exploded view thereof;

FIG. 9 is a front and bottom perspective view thereof; and,

FIG. 10 a front and bottom perspective exploded view thereof.

The portions of the article shown in broken lines in FIG. 10 form no part of the claimed design. 

CLAIM The ornamental design for a diffuser, as shown and described. 